1、BRITISH STANDARD BS4742-3: 1985 ISO5670: 1984 Hydraulic equipment for agricultural machinery Part3: Specification for dimensions and pressure rating of single-acting telescopic tipping cylinders for trailers ISO title: Agricultural trailers Single-acting telescopic tipping cylinders 25MPa(250bar) se
2、ries Types1,2 and3 Interchangeability dimensions UDC631.372:629.114.2578.4BS4742-3:1985 This British Standard, having been prepared under the directionof the Agricultural Machinery and Implements Standards Committee, was published under the authority ofthe Board of BSI and comesintoeffecton 29Novemb
3、er1985 BSI10-1999 The following BSI references relate to the work on this standard: Committee reference AGE/25 Draft for comment82/80568 DC ISBN 0 580 14691 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Agricultural Machinery and Imp
4、lements Standards Committee (AGE/-) to Technical Committee AGE/25, upon which the following bodies were represented: Agricultural Engineers Association Association of Hydraulic Equipment Manufacturers British Agricultural and Garden Machinery Association Ltd. Ministry of Agriculture, Fisheries and F
5、ood National Farmers Union National Institute of Agricultural Engineering Amendments issued since publication Amd. No. Date of issue CommentsBS4742-3:1985 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii 0 Introduction 1 1 Scope 1 2 Field of application 1 3
6、References 1 4 Definitions 1 5 Classification 1 6 Dimensional requirements 1 7 Pressure rating 1 8 Oil feed orifice 1 Figure 1 Type1 cylinders 2 Figure 2 Type2 cylinders 3 Figure 3 Type3 cylinders 4 Table 1 Dimensional requirements of type1 cylinders 2 Table 2 Dimensional requirements of type2 cylin
7、ders 3 Table 3 Dimensional requirements of type3 cylinders 5 Publications referred to Inside back coverBS4742-3:1985 ii BSI 10-1999 National foreword This British Standard, which has been prepared under the direction of the Agricultural Machinery and Implements Standards Committee, is identical with
8、 ISO5670:1984 “Agricultural trailers Single-acting telescopic tipping cylinders25MPa(250bar) series Types1,2 and3 Interchangeability dimensions” published by the International Organization for Standardization (ISO). Terminology and conventions. The text of the International Standard has beenapproved
9、 as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. The comma has been used as a decimal marker. In British Standards it is current pract
10、ice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. The Technical Committee has reviewed the provisions of ISO965-2, ISO3320 and ISO6149, to which reference is made i
11、n the text, and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does
12、 not of itself confer immunity from legal obligations. Cross-references International Standard Corresponding British Standard ISO228-1:1982 BS2779:1973 Pipe threads where pressure-tight joints are not made on the threads (Technically equivalent) Summary of pages This document comprises a front cover
13、, an inside front cover, pagesi andii, pages1 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS4742-3:1985 BSI 10-1999 1 0 Introduction T
14、he aim of this International Standard is to facilitate future projects by simplifying the design, manufacture and stocking of cylinders, reducing replacement costs and increasing the possibilities of interchangeability. 1 Scope This International Standard lays down dimensional characteristics and sp
15、ecifies the test pressure of the types of hydraulic tipping cylinders currently used on agricultural tippers, in order to provide a reasonably limited range from which manufacturers may choose a suitable cylinder to meet current and projected requirements. 2 Field of application This International S
16、tandard covers single-acting telescopic hydraulic cylinders for use at a pressure of25MPa(250bar), intended for use exclusively on agricultural trailer tippers. 3 References ISO228-1, Pipe threads where pressure-tight joints are not made on the threads Part1: Designation, dimensions and tolerances.
17、ISO965-2, ISO general purpose metric screw threads Tolerances Part2: Limits of sizes for general purpose bolt and nut threads Medium quality. ISO3320, Fluid power systems and components Cylinder bores and piston rod diameters Metric series. ISO6149, Fluid power systems and components Metric ports Di
18、mensions and design. 4 Definitions 4.1 single-acting cylinder a cylinder which provides a positive linear extension movement with a powered stroke 4.2 single-acting telescopic cylinder a single-acting cylinder which provides positive linear movement obtained in successive stages by a powered stroke
19、in extension 5 Classification The cylinders are divided into three types: type1, type2, type3; depending on their construction, method of attachment to the trailer and geometric configuration. Type1 cylinders are of two stage construction only; types2 and3 may be of two or three stage construction.
20、6 Dimensional requirements 6.1 Type1 cylinders Type1 cylinders shall in general be constructed in accordance with Figure 1 and with the dimensions and tolerances laid down in Table 1. 6.2 Type2 cylinders Type2 cylinders shall in general be constructed in accordance with Figure 2 and with the dimensi
21、ons and tolerances laid down in Table 2. 6.3 Type3 cylinders Type3 cylinders shall in general be constructed in accordance with Figure 3 and with the dimensions and tolerances laid down in Table 3. 7 Pressure rating 7.1 Service pressure The cylinder shall be designed for a maximum service pressure o
22、f25MPa(250bar) 7.2 Test pressure Every cylinder shall withstand a test pressure equal to1,5times the maximum service pressure. 8 Oil feed orifice The oil feed orifice shall comply with one of the two dimensions given in8.1 or8.2. 8.1 Gas thread The thread shall be G3/8, in accordance with ISO228-1.
23、8.2 Metric thread The thread shall beM18 1,5, in accordance with ISO965-2 and ISO6149. BS4742-3:1985 2 BSI 10-1999 Table 1 Dimensional requirements of type1 cylinders Figure 1 Type1 cylinders Dimensions in millimetres Designation a Stroke(s) min. A max. B min. C max. D max. E F G min. H d10 I H12 70
24、 90 900 670 37 25 28 70 130 45 45 37 90 110 900 1050 1200 690 765 840 37 25 28 90 160 45 45 37 110 130 1050 1200 1350 1500 800 875 950 1025 52 30 35 110 180 50 50 52 a The designation is purely for reference purposes. The figures in this column do not relate to dimensional requirements. +5 5 0 5BS47
25、42-3:1985 BSI 10-1999 3 Table 2 Dimensional requirements of type2 cylinders Figure 2 Type2 cylinders Dimensions in millimetres Designation a Stroke(s) min. A max. B min. C max. D max. E F G min. H d10 I H12 70 90 900 250 37 425 28 70 155 45 45 37 90 110 900 1050 1200 250 37 465 540 615 28 90 170 45
26、45 37 10 130 1050 1200 1350 1500 250 52 580 655 730 805 35 110 185 50 50 52 70 90 110 900 1050 1200 1350 1500 300 37 280 330 380 430 480 28 70 170 45 45 37 90 110 130 1200 1350 1500 1700 2000 300 52 420 470 520 570 630 35 90 185 50 50 52 a The designation is purely for reference purposes. The figure
27、s in this column do not relate to dimensional requirements. +5 5 0 5BS4742-3:1985 4 BSI 10-1999 Figure 3 Type3 cylindersBS4742-3:1985 BSI 10-1999 5 Table 3 Dimensional requirements of type3 cylinders Dimensions in millimetres Designation a Stroke(s) min. A max. C max. F G min. H d10 J bc max. L d H1
28、1 M d S e d10 T d10 W 70 90 900 275 460 155 45 45 125 14,5 125 45 45 230 90 110 900 1050 1200 275 275 275 480 555 630 170 45 45 125 14,5 125 45 45 230 110 130 1050 1200 1350 1500 315 315 315 315 540 615 690 765 185 50 50 125 14,5 125 50 50 280 70 90 110 900 1050 1200 1350 1500 280 280 280 280 280 34
29、0 390 440 490 540 170 45 45 125 14,5 125 45 45 230 90 110 130 1200 1350 1500 1700 2000 340 340 340 340 340 405 455 505 555 645 185 50 50 125 14,5 125 50 50 280 a The designation is purely for reference purposes. The figures in this column do not relate to dimensional requirements. b The flange face
30、shall be contained wholly within the square of side length J. c The attachment of the flange to the cylinder piston rod shall be so as to permit the flange face to articulate at least30 in any plane from its nominal position perpendicular to the axis of the cylinder. d There shall be four mounting h
31、oles equally spaced on a pitch circle of diameter M, nominally located on the diagonals of the square flange face and within0,2mm of the true position. e The design and method of mounting the trunnion shall be such that the axis of pins reference S can articulate at least 30 from its nominal positio
32、n perpendicular to the axis of the cylinder. 0 5 0 56 blankBS4742-3:1985 BSI 10-1999 Publications referred to Seenational forewordBS4742-3: 1985 ISO5670: 1984 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing Britis
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